Bookmarklet update

Re https://forums.zotero.org/discussion/41094/scannable-cite-bookmarklet-issues/

Fixes incompatibility with IE, fixes issue with institutional authors, adds support for multiple selection in mobile interface via Edit (all of these by moving to Zotero API). Also added spacing between bars, so it mostly matches what the translator produces (didn't add a space before/after author-date part)